"There are several things I think I would have done if I had the chance again. I would have been a little more patient about getting out into the world. I would have seen to it that I had a more formal education. I would have become an accomplished mu"

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Lots of people think, well, we're humans; we're the most intelligent and accomplished species; we're in charge. Bacteria may have a different outlook: more bacteria live and work in one linear centimeter of your lower colon than all the humans who have ever lived. That's what's going on in your digestive tract right now. Are we in charge, or are we simply hosts for bacteria? It all depends on your outlook.

— Neil deGrasse Tyson